专用化

High-speed, muti-services and economy have become the major issues of the futUreIP backbone technology As far as thes poiflt is concerned, thes paPer explores layer 3switdrig technology Which seParates control comPonent and fOrward comPontal in thetraditional roulers. TWo forwarding al gori thms ----d ata-driven mo d el and top olo gy drivenmodel are also comPared, a next generation IP backbone echno l o gy---- Multiproto co lLabel Switching is developed, with its operation and its dePloyInent in traffic engineering,c1ass-ofservce and virtual private network.

本文从未来IP骨干网技术所要求的高速化、多业务支持、经济性出发，介绍了在传统路由器基础上将控制部件和转发部件分离的第三层交换技术，比较了数据驱动模型和控制驱动模型两种转发算法，并由此引出下一代IP骨干网络技术——多协议标记交换，阐述了其工作原理以及在流量工程、服务等级区分和虚拟专用网中的应用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。